Telephone apparatus.



J. ERICKSON.

TELEPHONE APPARATUS.

APPLICATION MLBD Nov. 12. 1mm.

Patented Mar. 9, 1915.

2 SHEETS-SHEET 1.

J. ERICKSON. TELEPHONE APPARATUS.

APPLICATION FILED NOV. 12. 1906.

2 SHEETS-SHEET 2.

Allrlllllllw- TLLINUIS, ASSIGNOE, BY MESNE SSIGNMEWE, Nif@ EERST TRUST AND SAVINGS BANK, TRUSTEE, DE' CHLGAG, LLNES..

MEPHNE APPAM'YUS.

Speeiceton of Lettera Pate-nt.

Patented ii,

application mea noveno@ 12, ieee. semi no. 343,044.

To ci?. whom 'it may concern Be it lmcavnthatV I, JOHN Enicnson, a .citizen of the United States of America, and resident oi" Chicago, Cook county, lllinois, .5 have invented a certain new and useful Improvement in Telephone Apparatus, of

lwhich the 'foliowing is a specification.

My invention relates to automatic telelphone exchange systems, and more particu-- Vl'arly' to the devices by which the subscribers release the switches at the exchange or centralstation.

An object' of my invention iste provide improved means for insuring a; release of the saidautomatic switches, even though the subscribershook-switch,by means of which the releasing is accomplished, he given a quick downward movemen l' Another object is to provide certain novel features and details of construction and combinations tending to increase the general eliiciency of a telephone exchange system ci this particular character.

To the foregoing and other useful ends, my invention consists in matters hereinafter disclosed' and claimed.

In the accompanying drawings, Figure l shows my improved. switch-hook device in normal position-that is, when the receiver is in place on the switch-hook; the dotted lines show he position the hook takes when the rcceiveikisremoved from 'the switchhook. Fig. 2 isa cross-section of the device taken on the line 2--2 in Fig. l. Fig. 3 is a. cross-section on the line 3--3 in Figi, show ing the method o securing the switch-hook to thesupportin frame. Figs. e and' are detail views of iferent parte. Fig. 6 is e cross-section taken on line 6-6 in Fig.. 5.

Fig. 7 shows the hifurcat'ed end of the switch-hook. Fig. 8 shows my switch-hook lwith circuit connections. for its use'iin connectionwith an automatic telephone system.

f The calling device 'A of the substation in` connection with which my switcheho'ok device is shown controls the circuit of a hattery B for operating the connector@ of the@ central office.L The switch-hooki4 device, as shown in Fig. 1,- comprises a base or 'frame mounted. At the' lower part offtliesaid frame are formed the brackets 3, and atvt'he for the switch-hook 6 when the receiver is 2 upon which the variouspars areeilitihlv l.

- pressed down the end 10 rises, and the dog "wheei 2l is given a rotary motion j `Id irectici'i indicated hy the arrow.

removed, as shown by the dotted lines in Fig. l. Upon the bracket 5 is mounted' the hook-operating spring 7, hy means of the screw 8. Furthermore, the bracket 5 serves as e. stop or rest Jfor the switch-hook 6 when the receiver is restored and the said switchhook is down. Therefore, the brackets i and 5 limit the movement oi the said hook 5. By means of the screw 9 the hook is suitably se cured to the frame 2. About this screw 'the switch-hook is adapted to move when the rey ceiver is restored and removed. When the receiver is restored to the swicli-hook the weight of the-said receiver is sufficient to carry the'switchhook to its lowermost position, against the tension of the spring which position is reached when the end 10 strikes the stop or rest 5. Now when che receiver is removed the switch-hook 6 reaches its uppermost position, and the end l() strikes the stop 4. The switch-hook arm l1 with the bushing 12 is adapted to control. a group o springs D. Near the eatremitvl() of the switch-hook 6 the dog iii is suitably secured by means of the screw 13. The said degli is normally maintained in engage ment with the pin 15 by the retiacting` spring 16, one extremity of which is secured to the dog 14 by means ci' the pin 1T, and the other end is secured to the switch-hook 6 by means of the pin 18. Furthermore, Vto the switch-hcoh 6 1s suitably secured the locking spring 19, the function of which will been piaineol.

liotatahiy secured to the iframe 2 by means of the screw 2() is the wheel or disk 21 which controls the group of release springs E by means of the -bushing 22. This bushing is mounted upon the pin 23 (Fig. 6), which latter is secured 'to the wheel 2l. The rear end 24. ci the said nin entends through the wheel and into the slot 25 ci' the frame 2 (Fig. 5). By this arrangement, then, the angle through which the wheel 2i ,may he rotated is limited by the slot 25. Also secured upon the face of the wheel 21 are the pins 26 and 2'?. The pin 26 is adapted to he engaged by the 'clog Mwhen the switchhoos 1s up,

New when the switch-hook f6 is la heine', in engagement with the pin the switch-hool approaches its uppermost para as shown by the dotted lines in n the said springs into contact an tion the dog 14 comes into contact with the pin 15, and the pin 26 begins to slide off the dog 14, since the said pin is carried in a circular direction and the dog 14 in a vertical direction. By the time the switch-hook has reached its lowermost osition, 'as shown by the full lines in Fig. ii the dog 14 and the pin 26 are out of engagement, and the disk 21 being free returns to its normal position, after advancing as far as its momentuml will take it, if it does not reach the limit of the slot 25. The force for thus vrestoring the said wheel is supplied by the release spr' s 28, 29 and 30, since the bushing 22, when t e wheel was given its rotary motion pressed d out of normal position, thereby storing up force for restoring the disk 21 by straining or tensioning the springs 28, 29 and 30. -Therefore, when the do 14 and pin 26 disengage, the disk is imme iately restored in the opposite direction. The pin 27 which, in the meantime, bears against the spring 19, as the disk completes its return motion, is caught by the angled section 31, thereby locking the said wheel in the position shown in full lines in Fig. 1. Were this spr' 19 not provided the disk 21, when it comp etes its backward rotation, will again start a return motion and perhaps vibrate several times before being brought to rest. With this arrangement the disk is immediately brought to rest and locked upon the completion of the return motion. When the switchhook is permitted to rise thespring 19 is carried out of engagement with the pin 27, and when the switch-hook is in its uppermost position the said spring takes the position shown by the dotted lines. The return motion of the wheel is limited by the pin end 24 comin into contact with the end of the slot 25. uppose the switch-hook 6 is given a quick downward push, then the momentum gained by the wheel 21 may be suicient (after the dog`14 and pin 26 disengage) to carry the said wheel a triie farther. In this case the pin end 24 comes into contact with the other end of the slot 25, thus limiting the. rotation of the Wheel in this direction. Furthermore, when the switch-hook is down the arm 11 so operates the springs of the group D that the springs 32 and 33 disengage, springs 34 and 35 engage, and the springs 36 and 37 disengage. Of course,

when the switch-hook is up the arm 11 passes out of4 engagement with the spring 35 and the disengaged springs engage, and the engagedsprings disengage.

4By referring to Fig. 8 it will be seen how my improved switch-hook device may be used in connection with `an automatic substation, and in an automatic telephone system in connection with a connector switch of the type disclosed in United States Patent No. 815,176. 'When the receiver 38 is r@-v moved from the switch-hook 6 the springs 36 and 37 enga e, thereby placing the ground post 39 o? the calling device A in connection with the substation ground G'. Also, the engagement of the springs 32 and 33 closes the local battery circuit through the transmitter 40, battery 41 and primary winding 42. The disengagement of the springs 34 and 35 removes the ringer 43 from across the line conductors 44 and 45. Then by operating the dial (not shown) which is, carried on the shaft 51 of the keyboard lA, the impulse wheel 52 is made to press the impulse springs 53 and 54 onto the ground post 39, delivering a suitable number of limpulses first to the vertical line conductor 44 and then one to the rotary line conductor 45. As a result the vertical and rotary line relays 46 and 47 of the connector are energized, raising and operating the switch as is customary. After the vertical and rotary line relays 46 and 47 have been energized and the switch operated, the well known release of the connector may be brought about by restoring the receiver 38to the switch-hook 6, which latter on its downward course rotates the disk 21, as previously explained; thus the springs 28, 29 and 30 are brought into Contact, as a result grounding the vertical and rotary line conductors 44 and 45 simultaneously, which causes the vertical and rotary relays 46 and 47 .to energize together, and as a result complete an energizing circuit through the release magnet 51a. When the switch-hook is fully restored to its normal positi n the arm 11 bears against the spring 35 and closes the said spring in contact with spring 34, thereby bridging the ringer 43 across the line. Furthermore, the springs 32 and 33 are disengaged, which opens the local battery circuit through the transmitter 40. Also, the disengagement of the springs 36 and 37 removes the substation ground G from the calling device A.

From the fore oing it will be seen that my switch-hook is a apted to operate the groups of springs E and D, which springs may be arranged or varied to control various circuits as desired. The same apparatus may, of course, be used tooperate a selector like the one disclosed in United States Patent No. 815,321. In that case the line conductors 44 and 45 will terminate in the proper jacks of said switch. My invention may also be used where both selectors and connectors are used in makingv a call. It has been customary, heretofore, in automatic telephones to connect the switch-hook through the me- Icontrolling the descending speed 'of the switch-hook has been to control the length @fr time niet tss senese springs se, se ses 30 are meinteined contee@ as it hes been found that if the length ot" contact 'has been too short the exchange apparateswill not have time .to operate. .ln my telephone l provide a simple keyboard comprising the usual shaft 5l to which the-dial is attached, as disclosed in United States Mettere Patent No. 1,101,853, issued J une ,30, 1914, to Keith, Erickson and Erickson, 'for improvement in automatic telephone systems. `Upon the'said shaft there are mounted the vusual gearwheel 55, the'impnlse wheel 52 and a cam 56. This cam controls the secondary circuit springs so that when the dial is turned the said springs separate andthe line conductors are kept apart while the i ulses are I 1 being transmitted tothe line. e gearwheel 55 is geared to the governor 57, so that the return motionl of the dial will be controlled. It will he seen, therefore, that I provide a very simple automatic telephone of the above type in which it makes no dify ference how quickly a subscriber moves down his switch-hook, so far as the releasing impulses are concerned. lt will also be seen that l provide an improved, simplified and highly 'edicient hook-switch and calling mechanism for automatic ,telephone substations. i -L What claim as my invention is l. A' subscrihers switch-hook, a rotary "member operated by the upward'movement of a portion of the switch-hook, a setoi switch springs operated `by said rotary member, and means including said switch springs whereby the said member is restored to normal position when the hook reaches the limit of itsmotion. p

2.' A snbscribers switch-hook, a rotary member operated by the upward movement of a portion of the switch-hook, a set of switch springs closed by the forward rotation of said member;J and means including said switch springs whereby the said member is restored to normal position when the hook rea-ches the limit of its motion.

v3. The combination of a switch-hook, a pivoted and spring-pressed catch on said hook, a rotarydisk, a pin on the disk adapted to engage said catch when the hook is up, a set of switch springs, means on said disk for operating' said switch springs, a second pin on thedisk, a spring catch on the hook adapted to engage said second pin when the hook is down, and a pin on the hook for throwing said pivoted catch out of engagement with said first-mentioned pin when the hook reaches the limit o' its downward movement. y 1

4; In a telephone system, a switch-hook, springs, a rotary member` provided with means for operating said springs, and means carried by the switch-hook for operating 65 said rotary member by upward movement,

adapted to be drieen egtdthereirom when the switch-iso-oir Teac es the limit of its mo tion, one 'of 'said spr-in adapted to restore said member to-norma pesition.

5. lin a telephone system, a 'rotery member, a switch-hook provided with means Jfor rotating seid member by upward fmovement when the receiveris hung np, adapted to release' the rotary member to permit the' latter' to rotate beck to normal position when the switch-hook reaches the limit of its 4motion, and switch springs controlled by said rotary member. i 6. ln a` telephone system, circuitecontroh ling springs, a wheel provided with a lateral projection for engaging and operating said springs, a pivoted` switch-hoolr,aspring pressed dog carried by said switch-hook, and means on said wheel to be engaged by said dog' to cause the operation of said springs, said dog adapted to be disengaged from the wheel when the switch-hook reaches the limit of its downward motion, whereupon the wheel is then restored to normal position by one of said springs. v

7 ln a. telephone system, a pivoted switclr- Y hook, a wheel associated therewith, means carried by the switch-hook for operating the wheel, circuitcontrolling springs operated by the forward rotation of the wheel,

a locking spring carried by the switch-hook,

and means on the wheel engaging said lociring spring. to hold the wheel in normal position.

8. ln a telephone system, a pivotcdswitchhook, a dog pivoted on said hook, means `for limiting the motion of the dog in one direction relative' to the hook, a spring normolly holding the dog at the limit of its motion in said one direction, a .wheel associated with the hook, means on the wheel to be engaged by said dog when the hook rises, adapted to cause the` rotation of the wheel when the hoolrvdescends, and circuitcontrolling springs operated by the forward 'iro rotation of said wheel, the upward motion of said dog .being suliicient to automatically disengage it from the wheel when the hook reaches the limit of its downward motion,l

whereupon the wheel is then restored to normal position by one of said circuit-controlling springs.

9. ln a telephone system, a pivotcd switch hook, a wheel associated therewith, a spring on the hook, a projection on the side of the wheel adaptedy to engage said spring to lock the wheel in 'normal position, said spring having a straight portion upon which the said proyection rides 'while the wheel is returning to normal position, means carried by the switchhook ton operating said wheel by the downward motion oi' the hook, and circuit-controlling springs operatively controlled by the forward rotation of the i wheel when the receiver is hung up.

is restored to normal of the switch-hook, means for rotating said wheel back to normal, means whereby said wheel lis automatically released by the switch-hook to rotate back to normal position when the h ook reaches the limit of said motion, and switch springs controlled by said` wheel.

12. In a telephone system, a wheel, a

switch-hook, means byl which the hook ro tetes the wheel in one direction by upward movement when the receiver is hungup, and

spring means for rotating the same in the ithekr direction independent of 'the switch o 13. A subscribers switch hook,4 a rotary member operated bythe upward movement of. absection of the hook, a set of switch spi-ings' operated by said rotary member, and automatic mechanical means including said switch springs whereby the said member osition when the hook reaches the limit o its motion.

14. A subscribers switch hook, a rotary I member operated by an upward movement of a section of the .switch hook, a set of switch springs closed by the forward rotation of-said member, and automatic mechanical meansincluding said .switch springs whereby the said Amember is restored to normal position when the hook reaches the limit of its motion.

15. In atelephone system, a switch hook, springs, a rotary member for operating said springs, and controlled by said switch hook uponthe upward movement of the same, a mechanical arrangement for disengagin the rotary member from the switch hoo when the latter reaches the limit of its motion, said rotary member being under the control of one of said springs whereby the rotary member is restored to normal position.

16. In a telephone system, apivoted switch hook, a wheel associated therewith and operated by thel switch hook, circuit controlling springs under the control of the wheel upon its forward rotation, a locln'ng spring carried by the switch hook, a catch Von the wheel engaging the locking springv to hold the wheel in normal position.

17. In a telephone system, a bracket plate, a switch hook pivoted between its ends thereon, a set of circuit controlling springs controlled by said switch hook'adapted to be engaged when the switch hook rises, a wheel mounted on the bracket plate, another set of circuit controlling springs, a projection on said wheel for operating said second set of springs, and a controlling arm on the switch hook arranged to rotate the wheel by an upward movement when the receiver is .hung up on the hook. Y

Signed by me at Chicago, Cookv county, Illinois, this 8th day of November, 1906.

Y JOHN ERICKSON. Witnesses:

EDWARD D. Fume, ARTHUR B. Srnnnr. 

